call dispose on pub and track

lib/src/track/local_track_publication.dart

@@ -15,6 +15,11 @@ class LocalTrackPublication extends TrackPublication {
     this._participant,
   ) : super.fromInfo(info) {
     this.track = track;
+    // register dispose func
+    onDispose(() async {
+      // this object is responsible for disposing track
+      await track.dispose();
+    });
   }
 
   /// Mute or unmute the current track. When muted, track will stop sending data

lib/src/track/remote_track_publication.dart

@@ -17,6 +17,19 @@ class RemoteTrackPublication extends TrackPublication {
   lk_rtc.VideoQuality _videoQuality = lk_rtc.VideoQuality.HIGH;
   lk_rtc.VideoQuality get videoQuality => _videoQuality;
 
+  RemoteTrackPublication(
+    lk_models.TrackInfo info,
+    this._participant, [
+    Track? track,
+  ]) : super.fromInfo(info) {
+    this.track = track;
+    // register dispose func
+    onDispose(() async {
+      // this object is responsible for disposing track
+      await track?.dispose();
+    });
+  }
+
   set videoQuality(lk_rtc.VideoQuality val) {
     if (val == _videoQuality) return;
     _videoQuality = val;
@@ -76,14 +89,6 @@ class RemoteTrackPublication extends TrackPublication {
     }
   }
 
-  RemoteTrackPublication(
-    lk_models.TrackInfo info,
-    this._participant, [
-    Track? track,
-  ]) : super.fromInfo(info) {
-    this.track = track;
-  }
-
   void _sendUpdateSubscription({required bool subscribed}) {
     logger.fine('Sending update subscription... ${sid} ${subscribed}');
     final subscription = lk_rtc.UpdateSubscription(